I ask only once a year: please help the Internet Archive today. Right now, we have a 2-to-1 Matching Gift Campaign, so you can triple your impact! Most can’t afford to give, but we hope you can. The average donation is $45. If everyone reading this chips in just $5, we can end this fundraiser today. All we need is the price of a paperback book to sustain a non-profit website the whole world depends on. We have only 150 staff but run one of the world’s top websites. We’re dedicated to reader privacy so we never track you. We never accept ads. But we still need to pay for servers and staff. I know we could charge money, but then we couldn’t achieve our mission: a free online library for everyone. This is our day. Today. To bring the best, most trustworthy information to every internet reader. I believe all of this is doable, if we pull together to create the internet as it was meant to be. The Great Library for all. The Internet Archive is a bargain, but we need your help. If you find our site useful, please chip in. Thank you.
—Brewster Kahle, Founder, Internet Archive
Dear Internet Archive Supporter,
I ask only once a year: please help the Internet Archive today. Right now, we have a 2-to-1 Matching Gift Campaign, so you can triple your impact!The average donation is $45. If everyone reading this chips in just $5, we can end this fundraiser today. All we need is the price of a paperback book to sustain a non-profit website the whole world depends on. We’re dedicated to reader privacy so we never track you. We never accept ads. But we still need to pay for servers and staff. I know we could charge money, but then we couldn’t achieve our mission. To bring the best, most trustworthy information to every internet reader. The Great Library for all. The Internet Archive is a bargain, but we need your help. If you find our site useful, please chip in. Thank you.
—Brewster Kahle, Founder, Internet Archive
Dear Internet Archive Supporter,
I ask only once a year: please help the Internet Archive today. Right now, we have a 2-to-1 Matching Gift Campaign, so you can triple your impact!The average donation is $45. If everyone reading this chips in just $5, we can end this fundraiser today. All we need is the price of a paperback book to sustain a non-profit website the whole world depends on. We’re dedicated to reader privacy so we never track you. We never accept ads. But we still need to pay for servers and staff. I know we could charge money, but then we couldn’t achieve our mission. To bring the best, most trustworthy information to every internet reader. The Great Library for all. The Internet Archive is a bargain, but we need your help. If you find our site useful, please chip in. Thank you.
—Brewster Kahle, Founder, Internet Archive
Dear Internet Archive Supporter,
I ask only once a year: please help the Internet Archive today. Right now, we have a 2-to-1 Matching Gift Campaign, so you can triple your impact!The average donation is $45. If everyone chips in just $5, we can end this fundraiser today. All we need is the price of a paperback book to sustain a non-profit library the whole world depends on. We’re dedicated to reader privacy. We never accept ads. But we still need to pay for servers and staff. I know we could charge money, but then we couldn’t achieve our mission. To bring the best, most trustworthy information to every internet reader. The Great Library for all. We need your help. If you find our site useful, please chip in.
—Brewster Kahle, Founder, Internet Archive
Thanks for donating. Would you consider becoming a monthly donor starting next month?
Monthly support helps ensure that anyone curious enough to seek knowledge will be able to
find it here. For free.
Together we are building the public libraries of the future.
byKevin France; Richard McCray; Kevin Heng; Robert Kirshner; Peter Challis; Patrice Bouchet; Arlin Crotts; Eli Dwek; Claes Fransson; Peter Garnavich; Josefin Larsson; Stephen Lawrence; Peter Lundqvist; Nino Panagia; Chun Pun; Nathan Smith; Jesper Sollerman; George Sonneborn; John Stocke; Lifan Wang; Craig Wheeler
texts
eye34
favorite 0
comment 0
Observations with the Hubble Space Telescope (HST), conducted since 1990, now offer an unprecedented glimpse into fast astrophysical shocks in the young remnant of supernova 1987A. Comparing observations taken in 2010 using the refurbished instruments on HST with data taken in 2004, just before the Space Telescope Imaging Spectrograph failed, we find that the Ly-a and H-a lines from shock emission continue to brighten, while their maximum velocities continue to decrease. We observe broad... Source: http://arxiv.org/abs/1009.0518v1